ZA-725 User Manual
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ZA-725 User Manual
19
Squelch Level Checking
Either side key can be programmed to enable this function. When you press
the side key to check the squelch level, the radio will indicate the level 1-9.
There will be no indication if the squelch is at level 0 as it is disabled.
Time-out Timer
The purpose of the Time-out Timer is to prevent any person jamming up a
channel for a long time whilst transmitting. If the time that you continuously
transmit exceeds the set Time-out time, the transceiver will stop transmitting
and a tone “beep” will sound. To stop the tone, release the PTT switch. You
can press the PTT switch again to resume transmitting.
Note: you can set up the time level: OFF, 30s, 60s, 90s …… 300s
Factory programmed on TOT 90s
Tones
Some channels may have pre-programmed CTCSS/QT/DQT tones. A
CTCSS/QT/DQT tone is a sub-audible tone which allows you to ignore (not
hear) calls from other parties who are using the same channel. When you
receive a signal that has a tone different from the one set up in your
transceiver, you will not hear the signal. Likewise, signals that you transmit
will only be heard by parties whose CTCSS/QT/DQT tone matches the tone
set up in your transceiver. There are 38 standard CTCSS tones (see table for
allocated tones), 12 QT and 104 DQT which can be selected per channel.
Note:
Although using channels set up with CTCSS/QT/DQT tones relieves
you from listening to unwanted calls; it does not mean your calls will be
totally private.
Scan
Either side key can be programmed to activate / deactivate this function. The
scan function is useful when you want to find other people on similar
frequencies or to monitor communication within your group. If an active
channel is found the scan will stop and lock on to that channel. You can now
transmit and receive on this frequency. When the signal is gone for 5
seconds, scanning will resume. The radio will announce which channel of the
possible 16 programmed channels has been received. This is very useful
when monitoring a large number of channels and responding to the correct
channel.
AUXILIARY FUNCTIONS
The functions below can be programmed in software. Some of the functions
have been switched off before leaving the factory and may need to be
programmed if required.
Battery Save Function
The Battery Save function decreases the amount of power used when a
signal is not being received and no operations are being performed (no keys
are being pressed, and no switches are being turned). While the channel is
not busy and no operation is performed for 12 seconds, Battery Save turns
ON. When a signal is received or an operation is performed, Battery Save
turns OFF.
Factory programmed on Save On
Beep Tone
A beep tone is sounded when the radio is switched on or the side buttons
presses to activate / deactivate function. If the beep tone is unselected there
will be no beep when switching on or pressing side keys.
Factory programmed on Beep enabled
Squelch
The squelch level is used to adjust the threshold at which signals will open
the audio channel. A low level will allow weaker signals to be audible,
although with more background noise. However, if weak signals are
annoying, the level can be adjusted higher to open the channel only when
stronger signals are received.
You can set up the squelch level from 0 to 9. The higher the squelch level,
the less noisy is the signal as only stronger signal are accepted. The lower
the squelch level the noisier the signal is, as weak signals are also allowed.
As the communication range or obstructions between radios increase, the
weaker the signal becomes. It is advised to use a lower squelch level to get
further communication range.
Level 0 will disable the squelch function and the radio will receive all
background noise on that frequency at all times. You can set up the
appropriate squelch level via software according to the current
communication environment and requirements.
Factory programmed on Squelch level 5
